[Fiware-ngsi] QueryContext proposal

[Ernoe Kovacs]

Hi all,

Tovias is ill today, so I fear we will need some more time to answer.


-          Ernö


From: fiware-ngsi-bounces at lists.fi-ware.eu [mailto:fiware-ngsi-bounces at lists.fi-ware.eu] On Behalf Of Bisztray, Denes (NSN - HU/Budapest)
Sent: Donnerstag, 1. März 2012 08:48
To: ext Haller, Stephan; Tobias Jacobs; Martin Bauer; Farkas, Lorant (NSN - HU/Budapest); Zamani Farahani, Armin; fiware-ngsi at lists.fi-ware.eu; Tschirschnitz, Fabian
Subject: [Fiware-ngsi] QueryContext proposal


Hi all,

Here is my proposal for the queryContext semantics.

PLEASE READ CAREFULLY before replying.

Attribute mass replace scenario (either contextElements or /{contextElement}) level.

Note: the input as per page 22/sec.5.4.6.1 we assume only a set of ContextElements with the contained attributes and the update action type.

Note: in case the input ContextAttribute set of a ContextElement contains a set of ContextAttributes of the same name, then that ContextElement will fail in the ContextElementResponse structure with 400 Bad Request. (this is why the multiple value input with no metadata is not considered)

1.      Replace (update action), (PUT)

Input ->        One Attribute   Multiple Attibutes with same name
        no metadata at all      exact metadata match (one result)       partial metadata match (one result)     multiple result match   exact metadata match (one result per attribute value)   partial metadata match (one result per attribute value) multiple result match
One Attribute   replace replace Fail 409 / ?    Fail 409        Replace the matched ones        Fail 409 / ?    Fail 409
Multiple Attributes with same name      Fail 409        replace Fail 409 / ?    Fail 409        Replace the matched ones        Fail 409 / ?    Fail 409

Open question: what should happen to the Multiple Attribute Same Name input case with those attributes that are not matched?

2.      Append (append action), (POST)

Input ->        One Attribute   Multiple Attibutes with same name
        no metadata at all      exact metadata match (one result)       partial metadata match (one result)     Multiple result partial match   exact metadata match (one result per attribute value)   partial metadata match (one result per attribute value) multiple result partial match
One Attribute   Fail 400        Fail 409        Add new Add new Fail the matched ones with Fail 409, add the others     Add all Add all
Multiple Attributes with same name      Fail 400        Fail 409        Add new Add new Fail the matched ones with Fail 409, add the others     Add all Add all

3.      Delete (delete action), (DELETE)

Input ->        One Attribute   Multiple Attibutes with same name
        no metadata at all      exact metadata match (one result)       partial metadata match (one result)     Multiple result partial match   exact metadata match (one result per attribute value)   partial metadata match (one result per attribute value) multiple result partial match
One Attribute   Delete  Delete  Fail 409 / ?    Fail 409        Delete the matched ones         Fail 409 / ?    Fail 409
Multiple Attributes with same name      Fail 409        Delete  Fail 409 / ?    Add new Delete the matched ones Fail 409 / ?    Fail 409
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.fiware.org/private/fiware-ngsi/attachments/20120301/425acddf/attachment.html>